.left-tree {
    height: 100%;
    //border: 1px solid #d7d7d7;
    position: relative;
    padding-left: 20px;
    .disabled-mask {
        height: 100%;
        width: 100%;
        position: absolute;
        z-index: 3;
        cursor: not-allowed
    }
    .header-checkbox {
        position: absolute;
        bottom: 10px;
        left: 10px;
    }
}